Optimization of extraction process of Codonopsis pilosula polysaccharides and study on its composition Separation and purification of tanshinone from Salvia miltiorrhiza by combination of silica gel and high-speed counter-current chromatography Separation and purification of tanshinone from Salvia miltiorrhiza by combination of silica gel and high-speed counter-current chromatography Separation and Purification of Antihypertensive Peptides Derived from Pepper Seed Protein